Electrode holder



Sept. 7 1926.

A. R.' WELCH ELECTRODE HOLDER Filed May 2, 1925 M//////////////A llll.

' Ji l l 311mm oz GU 0: "e11 15 l ti g material thereby eliminating the haznecessary withdrawal thereof. The casing 'Patented's'ept. 1, 1926. 1,599,253

U NlT-EDiSTATES PATENT orrica.

mac'rnona 1101mm.

' Application filed May 2, 1925. Serial 1T0. 27,435.

My invention provides certain improveis a raised threaded area 10 for cooperatlon ments in electrode holders for use in electric with an internally threaded chuck head 11. welding. In devising these improvements The latter may. be constructed of metal but I have had in 'view the following objects, I prefer to form it of insulating material, namely, simplicity of construction, operation as for example bakelite. Its headed extrem- 5 and maintenance; facility of connection for ity 12 is movable towards and away from cable .or lead, permitting the use of anysize the flat end of the conducting bar to grip cable desired; a system of air cooliri so deor release the electrode which passes through signed as to avoid clogging whereiy any one or the other pair of eyes 13, 14 accordrequired current may be transmitted without ing to gage. 60 excessive heating; to provide positive clamp- A casing 15 of bakelite or other suitable ing means of the rotary chuck type thereby material completely insulates live metal insuring easy and rapid manipulation; to parts and provides sufiicient overlap for the provide a chuck head constructed of insuchuck head even in the event of more. than )5 ard of arcing andconsequent loss of current is Secured in fixed relation to the conductand depreciation of tool, a common fault'due ing bar 5 by one or more set screws 16 which to arcing of metal parts of ordinary holders; cooperate with an annular keyway 17. and finally to provide a well balanced tool no her ofiice of the casing. 15 is to proequipped with perfect and complete insulavide an air chamber for cooling purposes. .tion and providing maximum safety in op- Hence-its inner wall is spaced from the bar eration coupled with a wide range of adaptthe er ha radial Studs P l ability, for example, admitting of th use tions 18 to center the casing and maintain of el ctrode wir s of to 3 4 dig, ith ut the spaced relation. At the terminal end excessive heating. the sleeve or casing is fully open to the -75 With such and other objects in view, the passage of air and adequate circulation is nature, characteristic features and scope of afforded y B, 1 r la er l vents 19 near the invention will -more readily be underthe other end of the casing. stood from the following description taken The instant holder was devised after disin connection with the accompanying draw-' comforting experiences with so called stand- 80 ing forming a part hereof and illustrating ard holders and has demonstrated marked the preferred embodiment of the invention. suygriority under heavy service conditions.

Figure 1 is an elevational view of the aving described my invention, Iclaim: complete device broken away to expose the An electrode holder, comprising a solid cable connection,

Figure 2 is an elevational view of the contachment of a cable connection and formed ductor element of the holder, at the other end with a threaded seat, and

Figure 3 is a section on line 3-3 of Fig. intermediate the ends with radial studs or" 1, and A distance elements, a tubular head of insu-' 40 Figure 4 is a longitudinal sectional view 'lating material fitted to the seat and adaptof the chuck head. ed and arranged in conjunction with the.

According to my invention the main body head of the bar to grip an electrode, and a of the holder is a generally round bar 5 of one-piece casing sleeve of insulating material conducting stock, as coper. The bar 5 is surrounding the car and overlapping the cast or otherwise forme as a one piece contubular head, said sleeve being open at one us struction with one end bifurcated to proend and having lateral vents for unobstructvide cheeks or jaws 6 between which knives ed passage offlair for cooling purposes.

the live portionof terminal 7 of the lead or In testimony whereof I aflix my signature.

cable 8; the igrts being ultimately secured i M by a. bolt 9. ear the other end of the bar l ARTHUR R. j

conducting bar formed at one end for at- Bl 

